package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.SetmealMapper;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;


@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;

    //保存
    @Override
    public void saveWithDish(SetmealDto setmealDto) {
        //保存套餐的基本信息,操作setmeal,执行insert操作
        this.save(setmealDto);
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();

        setmealDishes.forEach(item->{
            item.setSetmealId(setmealDto.getId());
        });
        //保存套餐和菜品的关联信息  操作setmeal_dish,执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    //删除
    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
        //查询套餐状态,确定是否可以删除
        LambdaQueryWrapper<Setmeal> lqw = new LambdaQueryWrapper<>();
        lqw.in(Setmeal::getId,ids);
        lqw.eq(Setmeal::getStatus,1);

        int count = this.count(lqw);
        if(count>0){
            //如果不能删除,抛异常
            throw new CustomException("套餐正在售卖中,无法删除");
        }
        //如果可以删除 先删除套餐表中的数据  setmeal
        this.removeByIds(ids);

        //删除套餐对应的关系表数据
        LambdaQueryWrapper<SetmealDish> lq=new LambdaQueryWrapper<>();
        lq.in(SetmealDish::getSetmealId,ids);

        //删除关系表中的数据   setmeal_dish
        setmealDishService.remove(lq);
    }

    //根据套餐id修改售卖状态
    @Override
    public void updateSetmealStatusById(Integer status, List<Long> ids) {
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids != null,Setmeal::getId,ids);
        List<Setmeal> list = this.list(queryWrapper);

        for (Setmeal setmeal : list) {
            if(setmeal != null){
                setmeal.setStatus(status);
                this.updateById(setmeal);
            }
        }
    }

    @Override
    public SetmealDto getByIdWith(Long id) {
        Setmeal setmeal = this.getById(id);
        SetmealDto setmealDto = new SetmealDto();
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        //在关联表中查询, setmealdish
        queryWrapper.eq(id != null,SetmealDish::getSetmealId,id);

        if(setmeal != null){
            BeanUtils.copyProperties(setmeal,setmealDto);
            List<SetmealDish> list = setmealDishService.list(queryWrapper);
            setmealDto.setSetmealDishes(list);
            return setmealDto;
        }
        return null;
    }
}
